Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X125-100
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X125-100 is a genuine double-acting aluminum-barrel mini cylinder with a Ø20mm bore, a 125mm nominal stroke and a rear adjustable-stroke stopper — trim up to 100mm for a usable window of 25–125mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke125 mm
- Adjustable25–125 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionAdjustable air cushion (both ends)
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X125-100
The AirTAC MBLCJ20X125-100 is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and a tunable air cushion at both ends. With a 20mm bore, it delivers 157N push and 132N pull at 0.5 MPa. The rear stopper allows you to trim up to 100mm of travel, creating a usable stroke window of 25 to 125mm. This flexibility is ideal for dialing in exact motion profiles on packaging machines without machining new hardstops.
Unlike the base MBLJ which relies on a fixed rubber bumper, this model uses screw-tunable end-of-stroke deceleration to absorb kinetic energy smoothly, protecting the riveted aluminum end covers. The Ø8mm carbon-steel rod features 20µm hard-chrome plating to resist wear against the grease-retaining piston seal. Note that this specific SKU lacks the -S magnet option, so it cannot host a CMSG or DMSG position sensor. The adjuster is a travel stop, not a mechanical lock, so external guides must manage side loads.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X125-100 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X125-100 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 125 mm |
| Adjustable window | 25–125 mm (trim 100 mm) |
| Acting type | Double acting |
| Port size | G1/8 |
| Rod thread | M8×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable air cushion (both ends) |
| Max standard stroke | Up to 300 mm |
The rear stopper sets the end position — it is a travel stop, not a lock. Overall length = A + 2 × stroke + adjustable stroke. MBLJ/MBLCJ mounting is Basic / FA / LB only (no SDB, no back-cover code). Thread options: PT / G / NPT.
Theoretical Output Force (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | — |
| Max (@1.0 MPa) | 32 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a margin.
Model Code: Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X125-100
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×125 | Nominal stroke length in mm. |
| -100 | Adjustable-stroke amount (mm you can trim at the rear). |
| S | Optional built-in magnet for a CMSG/DMSG/EMSG sensor switch. |
Related: MBLJ (adjustable stroke, fixed bumper), MBL (fixed stroke), MBLD (double rod).
Where the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X125-100 Is Used
PCB routing stops
Dialing the 25-125mm travel window to gate printed circuit boards into a routing station, using the 157N push force to actuate lightweight indexing gates without overpowering the fragile panels.
Blister pack feeders
Tuning the end-of-stroke air cushion to gently decelerate the 8mm rod when extending into a blister packaging line, preventing the aluminum end covers from cracking under rapid cycling.
Textile loom tappers
Adjusting the rear stopper on a textile weaving machine to set precise 30mm tapper strokes on the fly, accommodating different fabric thicknesses without swapping the entire cylinder.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X125-100 the Right Cylinder?
Stepping down to the 20mm bore limits you to 157N of push force at 0.5 MPa; if your payload requires more thrust, the next size up is the 25mm bore, which provides 245N. Choose this MBLCJ variant over the MBLJ when your application moves a heavy mass at high speed and needs the tunable air cushion to prevent end-cap impact. Remember that the rear adjuster sets the travel end position and the cushion only decelerates; neither holds a load pneumatically, so a separate locking mechanism is required for static holding. Mounting is restricted to Basic, FA, or LB styles, as there is no SDB pivot or back-cover option. For a drop-in replacement, match the 20mm bore, 125mm stroke, 100mm adjust code, G1/8 port, PT thread, and confirm no magnet is fitted.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Adjustable window fits your end position
- ✓ Adjuster is a travel stop, not a lock
- ✓ Magnet (S) for sensors?
- ✓ Side load — add a guide on long strokes
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear stopper for the end position (a travel stop, not a lock).
- check Avoid side load; add an external guide on long strokes.
- check Mounting: Basic / FA flange / LB foot (no SDB, no back-cover code).
- check Installation by qualified personnel per AirTAC docs.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X125-100 FAQ
This 20mm bore double-acting cylinder provides a push force of 157N and a pull force of 132N at 0.5 MPa. At 0.7 MPa, the push force increases to 220N. The maximum theoretical force is 32 kgf at 1.0 MPa, with an operating pressure range of 0.15 to 1.0 MPa.
The rear stroke adjuster is a mechanical travel stop that physically limits the rod extension from 125mm down to a 25mm minimum window. The adjustable air cushion is a screw-tunable valve that controls exhaust flow to decelerate the piston near the end of its travel. Neither system locks or holds the load in place; the cushion only absorbs kinetic energy.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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